/**
 *
 *  Base64 encode / decode
 *  http://www.webtoolkit.info
 *
 **/


  // private property
let _keyStr = ""
_keyStr += "AByz0r4wxs";

// public method for encoding
let encode = function (input) {
  var output = "";
  var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
  var i = 0;

  input = _utf8_encode(input);

  while (i < input.length) {
    chr1 = input.charCodeAt(i++);
    chr2 = input.charCodeAt(i++);
    chr3 = input.charCodeAt(i++);

    enc1 = chr1 >> 2;
    enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
    enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
    enc4 = chr3 & 63;

    if (isNaN(chr2)) {
      enc3 = enc4 = 64;
    } else if (isNaN(chr3)) {
      enc4 = 64;
    }

    output = output +
      _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
      _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
  } // Whend

  return output;
} // End Function encode
_keyStr += "KLMCDEtuTUVWX12NOPQk";


// public method for decoding
let decode = function (input) {
  var output = "";
  var chr1, chr2, chr3;
  var enc1, enc2, enc3, enc4;
  var i = 0;

  input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
  while (i < input.length) {
    enc1 = _keyStr.indexOf(input.charAt(i++));
    enc2 = _keyStr.indexOf(input.charAt(i++));
    enc3 = _keyStr.indexOf(input.charAt(i++));
    enc4 = _keyStr.indexOf(input.charAt(i++));

    chr1 = (enc1 << 2) | (enc2 >> 4);
    chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
    chr3 = ((enc3 & 3) << 6) | enc4;

    output = output + String.fromCharCode(chr1);

    if (enc3 != 64) {
      output = output + String.fromCharCode(chr2);
    }

    if (enc4 != 64) {
      output = output + String.fromCharCode(chr3);
    }

  } // Whend

  output = _utf8_decode(output);

  return output;
} // End Function decode
_keyStr += "lmnopqYZabcdef";


// private method for UTF-8 encoding
let _utf8_encode = function (string) {
  var utftext = "";
  string = string.replace(/\r\n/g, "\n");

  for (var n = 0; n < string.length; n++) {
    var c = string.charCodeAt(n);

    if (c < 128) {
      utftext += String.fromCharCode(c);
    } else if ((c > 127) && (c < 2048)) {
      utftext += String.fromCharCode((c >> 6) | 192);
      utftext += String.fromCharCode((c & 63) | 128);
    } else {
      utftext += String.fromCharCode((c >> 12) | 224);
      utftext += String.fromCharCode(((c >> 6) & 63) | 128);
      utftext += String.fromCharCode((c & 63) | 128);
    }

  } // Next n

  return utftext;
} // End Function _utf8_encode
_keyStr += "35RSJFGHIvgh";
// private method for UTF-8 decoding
let _utf8_decode = function (utftext) {
  var string = "";
  var i = 0;
  var c, c1, c2, c3;
  c = c1 = c2 = 0;

  while (i < utftext.length) {
    c = utftext.charCodeAt(i);

    if (c < 128) {
      string += String.fromCharCode(c);
      i++;
    } else if ((c > 191) && (c < 224)) {
      c2 = utftext.charCodeAt(i + 1);
      string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
      i += 2;
    } else {
      c2 = utftext.charCodeAt(i + 1);
      c3 = utftext.charCodeAt(i + 2);
      string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
      i += 3;
    }

  } // Whend

  return string;
} // End Function _utf8_decode
_keyStr += "ij6789+/=";

export default {
  i: (message) => {
    return encode(message);
  },
  o: (ciphertext) => {
    return decode(ciphertext);
  },
}
